Hybrid FE-FFTM Algorithm for Micromagnetic Modeling of Perpendicular SOMA Media

This paper presents numerical simulation of the write and read process based on self-organized magnetic array (SOMA) media to study the particle-array misalignment effects on recording performances. The simulation is based on a three-dimensional finite element micromagnetic model of the media and an analytical model of the single pole perpendicular recording write field. The physical problem is modeled with a hybrid finite-element method–boundary-element method formulation, and the evaluation is accelerated using a new fast Fourier transform on multipoles method. The results show the lowest signal and signal-to-noise ratio occur at the best alignment situation, which is to be accepted as the intrinsic characteristic for SOMA media.